Revenue recognition - Revenue by geographic region (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Revenues from contracts	$ 19,929,606	$ 19,065,194	$ 15,861,608
North America
Disaggregation of Revenue [Line Items]
Revenues from contracts	13,512,303	12,689,719	10,216,292
Europe
Disaggregation of Revenue [Line Items]
Revenues from contracts	3,915,691	3,777,507	3,156,024
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenues from contracts	2,277,466	2,379,791	2,290,557
Latin America
Disaggregation of Revenue [Line Items]
Revenues from contracts	$ 224,146	$ 218,177	$ 198,735